What is it: Powder Perfection - Step 3 Top Coat from OPI, the final step in the dipping powder process that seals in color with brilliant shine. What it does: Seals in Powder Perfection color with a glossy, high-shine finish. The final step used in a Powder Perfection service. What else you need to know: Powder Perfection is a quick-applying, odor-free acrylic alternative that promotes a clean-air environment while offering gel-like shine.